1.

1.1. 1/2 + 1/4 = ?

1.2. 1/2 + 1/4 + 1/8 = ?

1.3. 1/2 + 1/4 + 1/8 + 1/16 = ?

1.4. 1/2 + 1/4 + 1/8 + 1/16 + 1/32 + ... = ?

Draw a picture to help you imagine what happens in 1.4.

**Source: Calculus By and For Young People (ages 7, yes 7 and up),
1988, by Donald Cohen**

2.

**Source: The Math Forum**
** http://forum.swarthmore.edu**

3.

3.30. Which of the following is divisible by 2, 3, 4, and 5?

A) 2001
B) 2010 C) 2100 D) 2110

3.33. Find the largest *prime* factor of 30 x 40 x 50.

3.38. When the last 3 digits of a year (such as 1987) are consecutive
digits written in descending order, we'll call the year a *descending*
year. A *descending* year will next occurs in which century?

3.39. A circle has an area of 36pi?. What is the area of the smallest square that can surround the circle?

**Source: The Math League**
** http://www.mathleague.com**

Don Braffitt